I would say that the statement that shows this is a realist text is the description of human struggles in the form of Ivan Ilyich's suffering.
It is very realistic to show the everyday human struggles in a realist piece of literature.
I believe the legal document you are referring to is the English bill of rights which gave only the parliament the power to tax, unlike before when the king decided on taxes and used people's money to spend like there is no tomorrow.
"D. My mother or my father is going to pick me up from swim practice" is the only sentence that contains an error in subject-verb agreement, but this is common.
This pattern for an argumentative essay is more advanced than the previous three, and allows for a more complete development of your argument.
The pattern contains an introduction, a conclusion, and two main parts. In the three paragraphs of the first body part, you refute or rebut three points of the counterclaim. In three paragraphs of the second body part, you make three points in support of your main idea, and provide support for your claims.